12 New Words Added To Merriam-Webster's Collegiate Latest Edition

1. catfish n (1612): (second definition) a person who sets up a false personal profile on a social networking site for fraudulent or deceptive purposes
2. crowdfunding n (2006): the practice of soliciting financial contributions from a large number of people, especially from the online community 
3. dubstep n (2002): a type of electronic dance music having prominent bass lines and syncopated drum patterns 
4. fangirl n (1934): a girl or woman who is an extremely or overly enthusiastic fan of someone or something
5. freegan n (2006): an activist who scavenges for free food (as in waste receptacles at stores and restaurants) as a means of reducing consumption of resources
6. gamification n (2010): the process of adding games or gameline elements to something (as a task) so as to encourage participation
7. hashtag n (2008): a word or phrase preceded by the symbol # that classifies or categorizes the accompanying text, such as a tweet
8. selfie n (2002): an image of oneself taken by oneself using a digital camera, especially for posting on social network
9. social networking n (1998): the creation and maintenance of personal and business relationships, especially online
10. steampunk n (1987): science fiction dealing with 19th-century societies dominated by historical or imagined steam-powered technology
11. turducken n (1982): a boneless chicken stuffed into a boneless duck stuffed into a boneless turkey
12. tweep n (2008): a person who uses the Twitter online message service to send and receive tweets

References:

Merriam-Webster
'Selfie' among top 15 words added to Merriam-Webster dictionary